Carburetor for internal-combustion engines



'H. WESLAKE v I CARBURETOR FOR INTERNAL COMBUSTION ENGINES Jan. 5,1926. ,v 1,568,784

Filed Nov. 5, 1919 2 Sheets-Sheet 1 H. WESLAKE CARBURETOR FOR INTERNAL COMBUSTION ENGINES 2 Sheets-Sheet 2 Fig.6.

Inventor 3/, M40

.dttorney.

Patented Jan. 5, 1926. UNITED STATES 1,568,784 PATENT ornca.

I HENRY WESLAKE, or Exnrnn, ENGLAND, ASSIGNOR or own-HALF To HENRY JOHN WESLAKE, OF EXETER, ENGLAND.

CARBUBETOB FOR INTERNAL-COMBUSTION ENGINES.

Application filed November To all whom it may concern: r

Be it known that I, HENRY lVEsLAKn, a subject of the King of Great Britain and Ireland, residing at Franklyn, St; Thomas, Exeter, England,have invented certain new and useful Improvements Relating to Carburetors for Internal-Combustion Engines, of which the following is a specification.

This invention relates to carburetors, for internal combustion engines and has for its object to provide a carburetor adapted according to the demands of the engine to vary the amount of the volatile liquid passing through the jet nozzle on throttling the combustible mixture.

According to the invention I provide a carburetor in which a throttle valve in the form of a hollow drum or cylinder is provided to control the atomizing or mixing tube and is adapted at the same time to vary the exposed area of a jet nozzle, the orifice of which is in the formof a continuous slot extending diametrically across the mixing tube from side to side with its plane at right angles to the axis of the throttle valve and with a concave face formed to a radius substantially the same as that of the periphery of the throttle valve.

The invention comprises the features hereinafter described.

The invention is illustrated in the accom panying drawings in which Figure 1 is an elevation partly in section of a vertical type of carburetor provided according toithe invention, while Figures 2 and 3 are correspondingtransverse section and front elevation respectively.

Figures 4 and 5 are detail elevations of the nozzle. I

Figures 6 and 7 are horizontal section and plan respectively of a horizontal type of carburetor provided according to the invention.

In carrying the invention into effect as illustrated in Figures 1 to 3, the throttle valve 0; is formed of a hollow drum or cylinder transversely disposed within the mixing tube 12, and 1s adapted to be rotated as for example by a lever 0. The throttle valve a is formed as a hollow cylindrical plug and centrally with a bore of conical shape, whose axis aligns with the longitudinal axis of the mixin tube when the throttle val e i fi ly rea a moves t a a nlevel in the nozzle.

5, 1919. Serial No. 335,849.

- ment on the throttlevalve being partially or completely closed". On being closed one of the segmental parts 03 of the throttle valve a comes over part of the nozzle 6 whereby part of the nozzle orifice is closed, and thus part of the jet of. volatile liquid will in such positions of the throttle valve be cut oif.

l/Vith a View to secure effective atomization or to render the carburetor applicable for use with various classes of fuel, the throttle valve a is provided with a hollow jacket f and the trunnions 9 upon which the valve may be mounted to rotate on the mixing tube 6 may be hollow for the inlet or outlet to the jacket 7 of the heating fluid that may be used totraverse the jacket.

The jacket 7 may be used for hot water circulation or for the circulation of the exhaust gases.

The nozzle 6 is provided with a transversely disposed orifice having a concave face 71 or edges, of any suitable dimensions, and has secured to it a stem 6 by means of which it may be held while being secured in position.

The nozzle e may be provided with a cap j in proximity to the faces of the nozzle .6, leaving intervening spaces of gradually re duced area with a View of inducing a considerable velocity of air on each side of the nozzle orifice, and thus respectively to atomize the volatile liquid.

A needle valve is may be provided to be adjustable to vary the flow of the volatile liquid to the jet. For this purpose the needle valve 79 may be mounted within a boss Z within which it is screw threaded, and

.wing lock nut 17. may be provided to set the needle valve is in its adjusted position. Thus at low speed and full throttle s'uflicient volatile liquid will be passed to the nozzle 6 to provide a rich mixture. On the speed of the engine increasing the demand will be greater than the supply, consequently there will be a lowering of the petrol The petrol in the float chamber 0 is adjusted to the level of the tip of the nozzle 0. Therefore the supply hole which is adjusted by the needle valve is is alwayS below the petrol leve As the engine speed increases the level is lowered in the jet (but not in the float chamber 0). On the engine slowing down the petrol will again rise up to its normal level at the tip of the nozzle 0.

It will be understood that the jet nozzle 0 and the atomization or mixing tube Z) maybe disposed vertically, or horizontally or in any other position. Figures 1 to 3 show the vertical disposition and Figures 6 and 7 the horizontal disposition, the construction and letters of reference being otherwise the same.

I claim:

In a carburetor for internal combustion engines, the combination with a mixing tube of a throttle valve in the form of a drum havinga mixture passage-way therethrough, said throttle valve having a cylindrimil periphery, a nozzle through which the volatile liquid issues, the said nozzle having a cap, the orifice of which nozzle has the l OIIH of a continuous slot and extends diametrically across the mixing tube from side to side with its plane at right angles to the axis of the said throttle valve, the said nozzle having a concave lace formed to a radius substantially the same as that of the periphery of the throttle valve, and adjacent thereto substantially as described.

HENRY \VESLAKE. 

